A new version of E16 has been released. "Fix rendering issues when using pseudo-transparency; fix translucent moves of non-shaped windows; fix border right click (winops menu) in many themes; fix incorrect tracking of pointer motion when dragging window; fix potential trouble while exiting/restarting; various minor bug fixes and enhancements, see ChangeLog for details." Get it here.

AFAIK, it's not an official script. But the guy who wrote it and maintains it, is an e17 developer and helps maintaining the www.get-e.org website.

I've been tracking e17 for awhile, and I've always used this script. I used it to install e17 in /opt/e17, so that I can keep it separated from my main install (with software that is managed with a package manager). I use a ~/.xinitrc file to set correct paths and start e17 at login.